New themes, theme cleanups, remove fontFace support

• Added two new themes. One based on the US Web Design Standards and the other on the popular CSS framework Bootstrap.

Breaking changes

• Removed fontface support as not core to goals of project + many other better solutions for this. ffab1e9
• Deprecated fontSizeToMS function and replaced it with adjustFontSizeToMSValue. a69a413
• Deprecated fontSizeToPx function. Use adjustFontSizeTo instead. a69a413